Padlock.



rnaNx J. LEWIS, 'or' BUrFALo, NEW

PADLOCK.

Specification of Letters Patent.

Patented oet'. 1v, 1911.

Application tiled March-28, 1911. Serial No.'617,391.

To all'wlwm fit may concern:

Be it known that I, FRANK J. LEWIS, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Padlocks, of which the following is a specification. Y

The present invention comprehends certain new and useful improvements in pad locks, and the object of the invention is to provide an improved device of this character which is quite reliable and eiiicient in operation and which is particularly simple,

vdurable and inexpensive 1n construction.

Another object of the invention is to provide a padlock consisting of a barrel formed with an opening in one side, a spring-actuated latch bolt mounted within the barrel and movable across the opening, yand a shackle pivoted at one end tothe barrel and having lts 'free end adapted to be inserted through the opening in the barrel to be automatically engaged with the latch bolt.

A further object of the invention is to provide a padlock of this character in which the barrel is open at one end to permit the insertion of a tubular key that is engaged with the threaded end of the latch bolt to l retract the bolt against the force of its ac- BIO tuatin splring and thus release the shackle.

Wit t ese and other objects in view, as will more fully appear as the description proceeds, the invention consists of certain constructions, arrangements 'and combinations of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the followingedescription and accompanying drawing, in which:

Figure 1 is a perspective view showing my improved padlock andthe key therefor, in juxtaposition; Fig. 2 `is a longitudinal section of the padlock .with' the shackle locked in closed position and'wth the key inserted in the bore to engage the latch bolt; Fig. 3 is a transverse section on the line 3-3 of Fi 2 of the la bolt' etaehed, and Fi 5 is a lon 'tudinal section showing ano er ein-` bodiment of the invention wherein means `provided `for 'normally retaining l the latch bolt against retraction,

4 is a perspective view Corresponding andflike parts are referred to in the following description and indicated in Iall the views of the accompanying drawing by the same reference characters.'

My improved padlock includes a 'body portlon or easing 1 that is in the form of a barrel of an suitable size, the bore 2 of the barrel being open at one end and being permanently closed at its other end in any approved manner, as by means of a screw plug 3. The barrel is formed about mid-v way between its ends with an interior an` nular `shoulder 4, which faces toward the closed end of the bore, the portion of the bore between the shoulder` and said closed end being thus of greater diameter than the remainder of the bore. ,An openin 5 is formed in one side of the barrel an leads into the larger portion of the bore ata point ipln closeproximity to the inner end 'of the The shackle 6 of the padlock is mounted on lthe exterior of the barrel and is of ttgproximately the usual form, that is,

stantially U- haped. @ne'end of the shackle is pivoted between a pai-r of spaced ears 7 that outst-afnd from the periphery ofthe barrel in proximit to in longitudine. alnementwith the 'aforesaid opening 5. In the resent instance these ears are formed by t e outturned extremities of a metal `band 8 that is fitted rigidly around the barrel. However it is to be understood that I do not iimit m self the open end thereof and y to this particular construction, but i de-l 'l sired, the ears'may be formed int the barrel. kThe free end -of the s reduced to provides. shoulders 10 disposed on opposite sides of ral'with' okle is tongue 9 and stop* the base of the ton the tongue havin i erl me a beveled 4terminal 1 and being for above said edge y turning the s aclle 'about itspivot Ythe ton e maybe inserted through .the openingV so'as to ojeet inte interim' of. the barrel.'y The notion of-th pivot'n order to normallylwithdawfthe with an aperture 12. By i s 10- isto bear against the periphery .of the bar-y .45 f into the barrel until 'the shoulders 1Q are4 brought .to bear against the periphery of tongue from the opening and to support -ed in the bore 2 and which is formed at one end with a substantially cylindrical head'or follower 15 fitting the inner or larger por` tion of thebore. The bolt is held against turning movement within the barrel in any vsuitable manner, as for instance, by a lug 16 operating in a longitudinal groove 17 in the wall of the bore. A locking projection or tooth 18 is disposed eccentrically on the end face of the head '15 and is arranged at the side of the barrel adjacent to the opening 5. The end ofthe latch bolt Aremote from the head is threaded, as indicated'at 19,'and is received in the smaller portion of the bore and terminatesshort of the open end thereof, whereby to be entirely held within the barrel and to be substantially non-accessible. Coiled about the intermediate portion of the latch bolt is an expansion s ring 20 which is confined between the shoulder 4 and the head 15 and which serves to shoot the latch bolt toward the closed end of the barrel to hold the locking projection 18 against the inner end of the plug 3 and across the opening. It is to be noted that the face of the locking projection which is exposed through the opening 5 is beveled as indicated at 21..

In practice, the shackle is turned about its l pivot against the force of the spring 13 so as to insert the tongue in the opening 5 and to cause the same to bear against the locking rjiction 18. The beveled edge 11 is thus 'rought into engagement with the beveled face 21 and co-acts therewith to shift the latch bolt. longitudinally a ainst the force of the spring'20 to afford c earance for the tongue 8 and permitthe sametobe thrust the barrel. In this position the aperture 12 is" disposed .in longitudinal valinement with the locking projection 18. The spring 20 returns the latch'bolt to its normal osltion and seats the locking projection'in tj e aperture 12, whereby to automatically lockthe shackle inxclosed f ltabu ai' shank 23 withananular shoulder 24 attheouter osition.

In order to re ease fthe shackle there'is provided a" ke 'f 22 which has an interiorly and is formed endfof- .thefshankt The shank isl inserted through the 'open end of the `'bore 2 and is turned thereninfthe proper Cdirection to engage its interior threads with the threaded en of the bolt 14. .As-the shoulder 24 -abuts against the adjacent Tend 'of the barrel to limit the insertion of,v the shank into thel bore, the continued rotation of the key after it has been engaged with the latch bolt,

serves to retract the latch bolt against the .illustrated in`Fig. 5, means are provided for retaining the latch bolt-against' retractile movement, said means consisting essentially of a detent 25 that is slidably mounted in a transverse openin 26 in the barrel. This .opening is preferab y located in the side of the barrel adjacent to the shackle,`and communicates with the bore 2 at a point between the open end of the bore and the shoulder 4. The outer end of the opening is permanently closed through the 4instrumentality of a screw-plug 27 engaged therein. A spring 28 is interposed between the plug and the detent and tends to shoot the inner end of the latterbeyond the inner end of the opening `26 and into. a notch 29. The

notch is formed in the periphery of the reduced threaded end 19 of the latch bolt and is suitably arranged so that it is broughtintdregistry with the opening 26 when the latch bolt is advanced to its normal or operative position by the spring 20. When seated in the notch, the detent serves to positively revent the latch bolt from being retractedp by engaging an instrument other than the key 22, with the threaded end 19. In .this instance the tubular shank 23 of the key has a beveled extremity 30 and is of sutiicient length to extend inwardly in the bore 2 past the opening 26.v Whenthe key is turned into engagement with the threaded extremity of the latch bolt the beveled end 30 is brought to bear against a beveled yface 31 of the detent, whereby to press the detentwfrom the notch 29; and into the openfing' 26` againsttheforceof 'the spring 28.

This releases the latch bolt so that the continued turning movement of the key will retract the bolt in the manner hereinbefore described. `By reversing the movement of the key the latch bolt is, of course, returned -to'jits normal position andthe detent 25 is permitted tov rengage the notch 29.

What I claim is:

l1. A padlock including a casing having a cylindrlcal chamber formed in itsgside wall with a longitudinal groove, the casing being provided with an opening leading into the chamber at a point on the op osite side thereof from the groove, a shac e having its free end apertured and adapted to be inserted through said'op'enin'g intothe chanfber, and a locking member'having a cylin drical portion mounted to reciprocate withmember against rotation.

able telescopically into engagement formed at one side with a longitudinal projection adapted to pass through the aperture in the shackle, said locking member being provided at its opposite side with an outstanding peripheral lug operating in the longitudinal groove to guide the locking member in its movement and to hold the 2. A padlock including a casing, bolt movably mounted in the casing, means oa'rried by one of said parts and engaging the other part to hold the latch bolt against movement in the casing, a tubular key mov- With the latch bolt to shift the same in the casing, and means operated by said telescopic movement of the key, to retract the holding means to an inoperative position.

3. A padlock including a casing, a latch bolt movably mounted in the casing and having a screw-threaded portion, means ena latch gaging the threaded portion of the latch bolt to hold the bolt against movement, and means adapted to be` turnedv into engagement with said threaded portionk for forcing the holding means out of engagement there- With.

4. A padlock including a casing, a latch' bolt movably mounted 1n the casing and .having a screw-threaded end portion, means for engaging the screw-threaded portion of the bolt to hold the bolt against movement, and a key internally screw-threaded to engage the threaded end portion of the bolt, the key having a beveled extremity adapted to impinge against the holding means to disengage said means from the bolt.

In testimony whereof, I aiiiX my signature in presence of two Witnesses.

FRANK J. LEWIS. [n s.]

Witnesses:

IGNAOY JAWS, ERNST GSMITH. 

